mineral

Quartz (Druzy)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Clear to white/translucent; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Clear to white/translucent
Luster: Vitreous to greasy

Identified May 25, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Clear to white/translucent; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Formation & geological history

Formed from hydrothermal solutions or the cooling of magma rich in silica. Often found in veins or cavities within various rock types, including geodes.

Uses & applications

Used in electronics, watches (oscillators), manufacturing of glass, gemstones for jewelry, and as educational/specimen collections.

Geological facts

Quartz is one of the most abundant minerals in Earth's continental crust. Its name comes from the German word 'Quarz' which is of Slavic origin.

Field identification & locations

Identify in the field by its hardness (it scratches glass), lack of cleavage, and vitreous luster. Commonly found in mountainous regions, riverbeds, and as a component of granite and sandstone.